Question about Mitsubishi Diamante

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I have a 1998 mitsubishi diamante and when i turn my car on it goes below 1000 rpm and then shoots back up really quick, and also sometimes turns off what is the problem?

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Idle position sensor, is attched to the fuel system, best bet is to take it in.

Posted on Nov 26, 2008


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Posted on Jan 02, 2017


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4g93 high rpm idle

Normally, a fast isle indicates an air (vacuum) leak in the intake manifold area. Check all hoses for cracks or having come off. You can make a soapy water solution and put it in a spray bottle and spray the water on the hoses and connections as well as the throttle body mating points and the intake manifold to cylinder head connection. Anywhere there is a leak you will hear a momentary change in idle speed as the water seals up the leak for a moment or two.

Aug 28, 2012 | 1993 Mitsubishi Mirage

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95 mitsubishi diamante engine light

Take to service repair. The brake light indicator is something to deal with quickly. You could end in an accident and possible injuries.

Feb 26, 2018 | 1995 Mitsubishi Diamante

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1998 Mitsubishi Diamante stalled while driving

Check timing belt first. Some engines are interference types, such that when belt fails pistons may hit the valves causing major damage. Google search you engine # to see if your is or is not one of these. If non-interference type, you will just need to replace the belt, but most folks also replace the belt tensioner and perhaps water pump if it is also belt driven. You normally buy a kit of all these parts.

Feb 04, 2018 | 1998 Mitsubishi Diamante

2 Answers

I have a check engine light on my 2002 diamante so I'm trying to find the diagnostic port and I've had no luck. Please help!

I believe there's a standard location. When you are sitting in the driver's seat, it should be to your left, near the door, and right under the dash. The plugs look a little bit like the main port in a desktop computer.

I really hope this helps you locate your port.

Jan 27, 2011 | 2002 Mitsubishi Diamante

1 Answer

We have a 1998 Mitsubishi Diamante and we are trying to get the hub off, can you offer any assistance or a diagram perhaps

what hub?front back right left?put the wheel back on and trade it in mitsubishi are a nightmare.

Jun 20, 2010 | 1998 Mitsubishi Diamante

1 Answer

Oil change

If your not a Mech We would recommend a lube shop.

Quick easy and no hazmat issues.

If you don't know what your doing you can really screw things up easy.

Hope this tip helps.


Jan 25, 2010 | 1998 Mitsubishi Diamante

1 Answer

1998Mitsubishi Diamante keeps stalling when you stop

I have a 1997 Diamante has the same symptoms after the battery went flat. The automatic transmission serviceman said it was the computer controlling the transmission loosing it's program and had to re-train itself. He said there was a procedure for defaulting the computer but is was easier just to drive the car and it would fix itself.
My experience after owning the car for a number of years and several flat batteries is it fixes itself after about 1000 kilometers

Mar 23, 2009 | 1998 Mitsubishi Diamante

1 Answer

1998 mitsubishi diamante o2 sensor, o2 heater, EGR sys NOT READY

Check the O2 sensor heaters with an ohmmeter. Also test the EGR solenoid valve by applying 12 vdc directly to the solenoid pins.

Disconnect the HO2S.
  1. Measure the resistance between PWR and GND terminals of the sensor. Resistance should be approximately 6 ohms at 68°F (20°C). If resistance is not within specification, the sensor's heater element is faulty.
  2. With the HO2S connected and engine running, measure the voltage with a Digital Volt-Ohmmeter (DVOM) between terminals HO2S and SIG RTN(GND) of the oxygen sensor connector. Voltage should fluctuate between 0.01-1.0 volts. If voltage fluctuation is slow or voltage is not within specification, the sensor may be faulty.


Aug 21, 2017 | 1998 Mitsubishi Diamante

1 Answer

Air conditioning - Mitsubishi diamante sei 1998

Yes. A Recharge on the System will Fix this Issue. Please Rate My Response! Thanks!

Feb 01, 2009 | 1998 Mitsubishi Diamante

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